Optical Time Domain Reflectometer 0 to 60KM 4 in 1 OTDR Optic Fiber Tester 3.97in Screen 100‑240V EU Plug Item Type: Optical Time Domain Reflectometer Mode: AUA28U Joint Type: UPC OPM:-70 to +10dBm Material: ABS Wavelength: 1550nm (20dB) Dynamic Range: 20dB Measuring Distance: Approx. 0 to 60000m / 0 to 196850.39ft Fiber Optic Connector Type: 9/125 μ m SM Unit: tester, inch, mile Reflection Blind Area: Approx. 2m / 6.6ft Data Storage: 200 groups Display: 3.97 inch Resolution: 800 x 480pixels IPS screen (touchable screen) Power Supply: 7.4V 4400mAh lithium ion battery (shipped with built in battery) can be used for more than 5000 times Visual Fault Locator Wavelength: 650nm Output Power: Greater than or equal to 10mW Mode: CW, 1Hz, 2Hz Optical Fiber Type: SM, MM Optical Power tester Measuring Range: - 70 to +10dBm Wavelength Range: 800 to 1650nm Calibration Wavelength: 850, 1300, 1310, 1490, 1550, 1625 Detection Type: InGaAs